Anboo Adjustable Knit Bowknot PU Leather Puppy Dog Pet Doggie Cats Collars Necklaces (XS, Pink) Material of pet collar: PU Leather 5 adjustment holes for adjustment XS:30*1.5cm/11.81*0.59" S:37*1.5cm/14.57*0.59" M:42*2.0cm/16.54*0.79"